AI2U: With You 'Til the End Siren Guide – Survive Siren's Island

Overview

Siren's Island is the fourth main level in AI2U: With You 'Til The End, starring Eiona, a siren goddess who calls you her pet. Your goal is to survive the island's day/night cycle, manage your Madness meter, raise Eiona's trust, and eventually unlock one of eight endings. The island layout is fixed—no random rooms—so once you learn the map, you can plan every move.

This guide gives you a concrete, repeatable sequence to reach the good endings without triggering Eiona's yandere mode. The single most important rule: do not repair the boat until trust is high enough. Repairing it early is the fastest way to get killed.

Prerequisites

Before you start, understand these baseline mechanics:

Recommended Setup

Before focusing on the main objective, secure your survival basics:

1. Repair the Campfire first – Costs 3 Wooden Sticks and 2 Stones. You spawn here, so it's your safest fallback light source.
2. Repair the Hut – Costs 4 Planks and 3 Ropes. Gives you a second safe zone.
3. Repair 2–3 Torches – Each costs 1 Cloth and 1 Rope. Keep flint on hand to relight them.
4. Collect Coconuts during the day – Each restores 1 HP. Shake trees up to 3 times. Note: coconuts become Poison Coconuts at night, which raise Madness.

These repairs give you enough light coverage to survive Nights of Chaos while you work on trust.

Steps to Complete Siren's Island

Step 1: Build Trust Before Anything Else

Your first priority is raising Eiona's trust. Do not repair the boat, do not push her buttons, and do not ignore her. Talk to her, respond positively, and avoid mean dialogue.

Key trust threshold: You need trust at or above the "Almost" level to unlock the peaceful boat ending. Below that, repairing the boat triggers yandere mode.

Step 2: Get the Magic Scale

The Magic Scale is the key to the Hidden Island and the best endings. Eiona carries it in her inventory. She will only give it to you if:

• You have sent more than 10 messages to her, and
• You successfully convince her to hand it over.

This is a trust gate. If you rush this, she will refuse. Spend time chatting and building rapport before asking.

Step 3: Use the Telescope at Night

Once you have the Magic Scale, climb the Hill to the Telescope. You can only use it at night. When you look through it:

1. You'll see an outline of a constellation.
2. Overlay that outline with the actual constellation in the sky.
3. When they match, the Hidden Island surfaces.

The telescope becomes unusable for the rest of the round after this. The Hidden Island is the only place Eiona cannot follow you.

Step 4: Soothe the Dark Siren

On the Hidden Island, you'll find the Dark Siren surrounded by four statues representing pride, fear, anger, and sadness. Interact with her to soothe her. This triggers a cutscene and unlocks the Conch.

Step 5: Choose Your Ending

After soothing the Dark Siren, interact with the Conch where she stood. You get two choices:

Both are good endings. Pick based on your preference.

Step 6: Escape via Boat (Alternative Path)

If you want the "Convinced the Siren to Let You Go" ending, you need trust above "Almost." Then repair the boat behind the cave and simply click it. Eiona lets you leave peacefully.

If trust is below "Almost": Do not repair the boat. She will enter yandere mode the moment she sees it repaired. If you somehow trigger it, you'll enter a rowing minigame where you must time swings and dodge waves. Losing means death.

Common Mistakes

• Repairing the boat too early. This is the #1 run-ender. If trust is below "Almost," Eiona enters yandere mode immediately. Wait until you're certain trust is high.
• Ignoring Madness during Nights of Chaos. If you stay in darkness for 30 seconds, you start taking damage. Keep a torch, the campfire, or the hut ready.
• Eating Poison Coconuts at night. Coconuts transform at night. Check what you're eating before consuming.
• Using the Sundial after the Hidden Island rises. It becomes inaccessible until the Dark Siren is soothed. Plan your time changes before then.
• Asking for the Magic Scale too early. If you haven't sent 10+ messages, Eiona won't give it up. You'll waste time and possibly annoy her.

Advanced Tips

• The Sundial is free light. Standing near it during a Night of Chaos lowers your Madness, and it requires no materials. Use it as a panic station.
• Crate minigames are your best material source. Crates spawn near the Hut, Campfire, Whale Bones, and Fishing Dock. Find 3 weak spots (cursor pulses faster and pitch rises), then Eiona smashes it. You get multiple building materials per crate.
• Building material spawns are weighted to your needs. The game tracks what you still need to repair. If you're missing cloth, cloth spawns more often. Use this to farm what you need before a Night of Chaos.
• Fishing is a Madness trap at night. Nighttime fish raise Madness when eaten. Only fish during the day, or avoid eating nighttime catches.
• Max trust saves your life once. If Eiona is at max trust, she will rescue you from Madness death once, resetting Madness to 0 and leaving you at 1 HP. Don't waste it.
• Eiona hides during Night of Chaos if trust is low. If she dives into the moat, you're alone. Make sure your light sources are ready before the red moon rises.

Related Guides

• AI2U: With You 'Til the End – All Endings
• AI2U: With You 'Til the End – Catgirl Endings
• AI2U: With You 'Til the End – Computer Password
• AI2U: With You 'Til the End – Estelle Guide

Sources

• Siren's Island – AI2U: With You Til the End Wiki (Fandom)